Photo: Strickja · Public domain

Hydroxide mineral

Properties

Chemical formula

(Na,Ca,K)₀.₆(Mn⁴⁺,Mn³⁺)₂O₄·(H₂O)₁.₅

Group

Oxides

Crystal system

—

Hardness (Mohs)

—

Color

Brown

Luster

—

Streak

—

Density

1,5 g/cm³

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

4.FL.45

Dana classification

—

IMA status

Grandfathered mineral (G)

IMA symbol

Bir

Locality

🇬🇧 Birness (Ellon)

Type locality

—

Discovery year

—

Source: Wikidata